129525390 has 24 divisors (see below), whose sum is σ = 336766248. Its totient is φ = 34540080.

The previous prime is 129525379. The next prime is 129525391. The reversal of 129525390 is 93525921.

It is a happy number.

129525390 is a `hidden beast` number, since 129 + 525 + 3 + 9 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129525391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 719496 + ... + 719675.

It is an arithmetic number, because the mean of its divisors is an integer number (14031927).

Almost surely, 2^129525390 is an apocalyptic number.

129525390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129525390 is an abundant number, since it is smaller than the sum of its proper divisors (207240858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129525390 is a wasteful number, since it uses less digits than its factorization.

129525390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439184 (or 1439181 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 129525390 is about 11380.9221946203. The cubic root of 129525390 is about 505.9624686396.

The spelling of 129525390 in words is "one hundred twenty-nine million, five hundred twenty-five thousand, three hundred ninety".